International Society for Educational Information, Inc., 1973
Buku Teks
Prokhovnik, Raia
Routledge, 2015
Buku Teks
Tong, Rosemarie Putnam
Westview press, 1997
Buku Teks
Kosaka, Masataka
Kodansha International , 1972
Buku Teks
Joji Watanuki
University of Tokyo Press, 1977
Buku Teks